All SWTOR characters on PTS will be wiped every major game update, starting with Patch 2.7. Patch 2.7 is scheduled to deploy on the PTS on Feb 24, 2014.
PTS Character Wipes | 02.12.2014, 03:08 PM
I wanted to give you all a heads up that with every major Game Update, starting with Game Update 2.7, we will be wiping all characters on the Public Test Server. To get the best information we can from the PTS, we want characters to be freshly copied and as up-to-date as possible.
Instructions on how to copy your character will be included in every PTS blog, and will be available on the PTS forums.
We are aiming for February 24th. This, of course, is subject to change.